repeat.c

来自「Outputs messages to a 2line LCD」· C语言 代码 · 共 25 行

/************************************************************
 Controls LED 4 on the STK200.
 Simply toggles the state of LED 4 every time it runs. Uses
 ReRunMe to requeue itself each time. 
************************************************************/

#include "stdafx.h"
#include <avrstdio.h>
#include "multi.h"
#include	"multest.h"

static UNSIGNED state;

void Continous(void) {
	UNSIGNED val;

	state = ~state;
	val = (UNSIGNED)inp(PORTB);
	val &= 0xef;
	val |= state & 0x10;
  	outp(PORTB, val);
   ReRunMe(4);
}